Is NPHP3 p.Lys118Arg (c.353A>G) pathogenic?

NPHP3 p.Lys118Arg (c.353A>G) is classified Uncertain significance in NPHP3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-11-18). AlphaMissense: likely benign (0.1078); Very rare (popmax 8.48e-05%, nfe); Associated with nephronophthisis.

What condition is associated with NPHP3 p.Lys118Arg (c.353A>G)?

NPHP3 p.Lys118Arg (c.353A>G) is associated with nephronophthisis (ClinVar).

How common is NPHP3 p.Lys118Arg (c.353A>G) in the general population?

NPHP3 p.Lys118Arg (c.353A>G) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

How is Nephronophthisis inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about NPHP3 p.Lys118Arg (c.353A>G)?

AlphaMissense predicts likely benign (score 0.1078) — an in-silico prediction, not a clinical call.

NPHP3 p.Lys118Arg

c.353A>G · rs1441071135 · VCV2046976

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1078 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

nephronophthisis

⚠ Built without this gene's context — gene constraint and dosage, protein structure, pathways, panels and related-variant links were not looked up for this page. why

Computational evidence

Protein change
AlphaMissense	0.1078	likely benign
REVEL	0.524	indeterminate
SaProt	LLR -6.28	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 5.9	GERP 0.27, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 30 kb · p 0.87 · regional, not allelic
Overall
CADD	26.4	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.48e-05% European (non-Finnish) · 1/1,179,896 alleles

Overall 6.2e-05% 1/1,613,218 alleles · very rare exomes 1/1,460,920 · genomes 0/152,298 · joint denominator

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: NPHP3
Protein: p.Lys118Arg
Coding: c.353A>G
MANE Select: NM_153240
dbSNP: rs1441071135
Type: single nucleotide variant
Location: chr3:132722003 (GRCh38)

Full NPHP3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

nephronophthisis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Nephronophthisis (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Antenatal, Childhood, Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Finland)

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/nphp3-p-lys118arg (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown